Adding shader preprocessor support

Co-authored-by: TheOrangeDay <6472143+TheOrangeDay@users.noreply.github.com>

8 files changed, 442 insertions, 170 deletions

diff --git a/editor/code_editor.cpp b/editor/code_editor.cpp
index 3a0edf301d..fd331503ca 100644
--- a/editor/code_editor.cpp
+++ b/editor/code_editor.cpp
@@ -1594,6 +1594,10 @@ void CodeTextEditor::set_error_pos(int p_line, int p_column) {
 	error_column = p_column;
 }
 
+Point2i CodeTextEditor::get_error_pos() const {
+	return Point2i(error_line, error_column);
+}
+
 void CodeTextEditor::goto_error() {
 	if (!error->get_text().is_empty()) {
 		if (text_editor->get_line_count() != error_line) {
diff --git a/editor/code_editor.h b/editor/code_editor.h
index e2441cec2b..49679cc700 100644
--- a/editor/code_editor.h
+++ b/editor/code_editor.h
@@ -253,13 +253,14 @@ public:
 	void update_editor_settings();
 	void set_error(const String &p_error);
 	void set_error_pos(int p_line, int p_column);
+	Point2i get_error_pos() const;
 	void update_line_and_column() { _line_col_changed(); }
 	CodeEdit *get_text_editor() { return text_editor; }
 	FindReplaceBar *get_find_replace_bar() { return find_replace_bar; }
 	void set_find_replace_bar(FindReplaceBar *p_bar);
 	void remove_find_replace_bar();
 	virtual void apply_code() {}
-	void goto_error();
+	virtual void goto_error();
 
 	void toggle_bookmark();
 	void goto_next_bookmark();
diff --git a/editor/editor_asset_installer.cpp b/editor/editor_asset_installer.cpp
index 3d4bee4b4e..8fa486408e 100644
--- a/editor/editor_asset_installer.cpp
+++ b/editor/editor_asset_installer.cpp
@@ -112,6 +112,7 @@ void EditorAssetInstaller::open(const String &p_path, int p_depth) {
 		extension_guess["glb"] = tree->get_theme_icon(SNAME("PackedScene"), SNAME("EditorIcons"));
 
 		extension_guess["gdshader"] = tree->get_theme_icon(SNAME("Shader"), SNAME("EditorIcons"));
+		extension_guess["gdshaderinc"] = tree->get_theme_icon(SNAME("TextFile"), SNAME("EditorIcons"));
 		extension_guess["gd"] = tree->get_theme_icon(SNAME("GDScript"), SNAME("EditorIcons"));
 		if (Engine::get_singleton()->has_singleton("GodotSharp")) {
 			extension_guess["cs"] = tree->get_theme_icon(SNAME("CSharpScript"), SNAME("EditorIcons"));
diff --git a/editor/filesystem_dock.cpp b/editor/filesystem_dock.cpp
index fe6e6044a4..6240ac86ad 100644
--- a/editor/filesystem_dock.cpp
+++ b/editor/filesystem_dock.cpp
@@ -2034,6 +2034,10 @@ void FileSystemDock::_resource_created() {
 		make_shader_dialog->config(fpath.plus_file("new_shader"), false, false, 1);
 		make_shader_dialog->popup_centered();
 		return;
+	} else if (type_name == "ShaderInclude") {
+		make_shader_dialog->config(fpath.plus_file("new_shader_include"), false, false, 2);
+		make_shader_dialog->popup_centered();
+		return;
 	}
 
 	Variant c = new_resource_dialog->instance_selected();
diff --git a/editor/plugins/shader_editor_plugin.cpp b/editor/plugins/shader_editor_plugin.cpp
index 70b8c3aaa7..9a20b0087e 100644
--- a/editor/plugins/shader_editor_plugin.cpp
+++ b/editor/plugins/shader_editor_plugin.cpp
@@ -72,15 +72,42 @@ Ref<Shader> ShaderTextEditor::get_edited_shader() const {
 	return shader;
 }
 
+Ref<ShaderInclude> ShaderTextEditor::get_edited_shader_include() const {
+	return shader_inc;
+}
+
 void ShaderTextEditor::set_edited_shader(const Ref<Shader> &p_shader) {
+	set_edited_shader(p_shader, p_shader->get_code());
+}
+
+void ShaderTextEditor::set_edited_shader(const Ref<Shader> &p_shader, const String &p_code) {
 	if (shader == p_shader) {
 		return;
 	}
 	shader = p_shader;
+	shader_inc = Ref<ShaderInclude>();
+
+	set_edited_code(p_code);
+}
+
+void ShaderTextEditor::set_edited_shader_include(const Ref<ShaderInclude> &p_shader_inc) {
+	set_edited_shader_include(p_shader_inc, p_shader_inc->get_code());
+}
 
+void ShaderTextEditor::set_edited_shader_include(const Ref<ShaderInclude> &p_shader_inc, const String &p_code) {
+	if (shader_inc == p_shader_inc) {
+		return;
+	}
+	shader_inc = p_shader_inc;
+	shader = Ref<Shader>();
+
+	set_edited_code(p_code);
+}
+
+void ShaderTextEditor::set_edited_code(const String &p_code) {
 	_load_theme_settings();
 
-	get_text_editor()->set_text(p_shader->get_code());
+	get_text_editor()->set_text(p_code);
 	get_text_editor()->clear_undo_history();
 	get_text_editor()->call_deferred(SNAME("set_h_scroll"), 0);
 	get_text_editor()->call_deferred(SNAME("set_v_scroll"), 0);
@@ -132,11 +159,12 @@ void ShaderTextEditor::_load_theme_settings() {
 
 	syntax_highlighter->clear_keyword_colors();
 
-	List<String> keywords;
-	ShaderLanguage::get_keyword_list(&keywords);
 	const Color keyword_color = EDITOR_GET("text_editor/theme/highlighting/keyword_color");
 	const Color control_flow_keyword_color = EDITOR_GET("text_editor/theme/highlighting/control_flow_keyword_color");
 
+	List<String> keywords;
+	ShaderLanguage::get_keyword_list(&keywords);
+
 	for (const String &E : keywords) {
 		if (ShaderLanguage::is_control_flow_keyword(E)) {
 			syntax_highlighter->add_keyword_color(E, control_flow_keyword_color);
@@ -145,6 +173,13 @@ void ShaderTextEditor::_load_theme_settings() {
 		}
 	}
 
+	List<String> pp_keywords;
+	ShaderLanguage::get_preprocessor_keyword_list(&pp_keywords, false);
+
+	for (const String &E : pp_keywords) {
+		syntax_highlighter->add_keyword_color(E, keyword_color);
+	}
+
 	// Colorize built-ins like `COLOR` differently to make them easier
 	// to distinguish from keywords at a quick glance.
 
@@ -191,8 +226,12 @@ void ShaderTextEditor::_load_theme_settings() {
 		text_editor->add_auto_brace_completion_pair("/*", "*/");
 	}
 
+	// Colorize preprocessor include strings.
+	const Color string_color = EDITOR_GET("text_editor/theme/highlighting/string_color");
+	syntax_highlighter->add_color_region("\"", "\"", string_color, false);
+
 	if (warnings_panel) {
-		// Warnings panel
+		// Warnings panel.
 		warnings_panel->add_theme_font_override("normal_font", EditorNode::get_singleton()->get_gui_base()->get_theme_font(SNAME("main"), SNAME("EditorFonts")));
 		warnings_panel->add_theme_font_size_override("normal_font_size", EditorNode::get_singleton()->get_gui_base()->get_theme_font_size(SNAME("main_size"), SNAME("EditorFonts")));
 	}
@@ -227,39 +266,72 @@ static ShaderLanguage::DataType _get_global_variable_type(const StringName &p_va
 }
 
 void ShaderTextEditor::_code_complete_script(const String &p_code, List<ScriptLanguage::CodeCompletionOption> *r_options) {
-	_check_shader_mode();
-
 	ShaderLanguage sl;
 	String calltip;
-
 	ShaderLanguage::ShaderCompileInfo info;
+	info.global_variable_type_func = _get_global_variable_type;
+
+	Ref<ShaderInclude> inc = shader_inc;
+	if (shader.is_null()) {
+		info.is_include = true;
+
+		sl.complete(p_code, info, r_options, calltip);
+		get_text_editor()->set_code_hint(calltip);
+		return;
+	}
+	_check_shader_mode();
 	info.functions = ShaderTypes::get_singleton()->get_functions(RenderingServer::ShaderMode(shader->get_mode()));
 	info.render_modes = ShaderTypes::get_singleton()->get_modes(RenderingServer::ShaderMode(shader->get_mode()));
 	info.shader_types = ShaderTypes::get_singleton()->get_types();
-	info.global_variable_type_func = _get_global_variable_type;
 
 	sl.complete(p_code, info, r_options, calltip);
-
 	get_text_editor()->set_code_hint(calltip);
 }
 
 void ShaderTextEditor::_validate_script() {
-	_check_shader_mode();
-
-	String code = get_text_editor()->get_text();
-	//List<StringName> params;
-	//shader->get_param_list(&params);
+	String code;
 
-	ShaderLanguage::ShaderCompileInfo info;
-	info.functions = ShaderTypes::get_singleton()->get_functions(RenderingServer::ShaderMode(shader->get_mode()));
-	info.render_modes = ShaderTypes::get_singleton()->get_modes(RenderingServer::ShaderMode(shader->get_mode()));
-	info.shader_types = ShaderTypes::get_singleton()->get_types();
-	info.global_variable_type_func = _get_global_variable_type;
+	if (shader.is_valid()) {
+		_check_shader_mode();
+		code = shader->get_code();
+	} else {
+		code = shader_inc->get_code();
+	}
 
 	ShaderLanguage sl;
 
 	sl.enable_warning_checking(saved_warnings_enabled);
-	sl.set_warning_flags(saved_warning_flags);
+	uint32_t flags = saved_warning_flags;
+	if (shader.is_null()) {
+		if (flags & ShaderWarning::UNUSED_CONSTANT) {
+			flags &= ~(ShaderWarning::UNUSED_CONSTANT);
+		}
+		if (flags & ShaderWarning::UNUSED_FUNCTION) {
+			flags &= ~(ShaderWarning::UNUSED_FUNCTION);
+		}
+		if (flags & ShaderWarning::UNUSED_STRUCT) {
+			flags &= ~(ShaderWarning::UNUSED_STRUCT);
+		}
+		if (flags & ShaderWarning::UNUSED_UNIFORM) {
+			flags &= ~(ShaderWarning::UNUSED_UNIFORM);
+		}
+		if (flags & ShaderWarning::UNUSED_VARYING) {
+			flags &= ~(ShaderWarning::UNUSED_VARYING);
+		}
+	}
+	sl.set_warning_flags(flags);
+
+	ShaderLanguage::ShaderCompileInfo info;
+	info.global_variable_type_func = _get_global_variable_type;
+
+	if (shader.is_null()) {
+		info.is_include = true;
+	} else {
+		Shader::Mode mode = shader->get_mode();
+		info.functions = ShaderTypes::get_singleton()->get_functions(RenderingServer::ShaderMode(mode));
+		info.render_modes = ShaderTypes::get_singleton()->get_modes(RenderingServer::ShaderMode(mode));
+		info.shader_types = ShaderTypes::get_singleton()->get_types();
+	}
 
 	last_compile_result = sl.compile(code, info);
 
@@ -524,15 +596,23 @@ void ShaderEditor::_update_warnings(bool p_validate) {
 }
 
 void ShaderEditor::_check_for_external_edit() {
-	if (shader.is_null() || !shader.is_valid()) {
+	bool use_autoreload = bool(EDITOR_GET("text_editor/behavior/files/auto_reload_scripts_on_external_change"));
+
+	if (shader_inc.is_valid()) {
+		if (shader_inc->get_last_modified_time() != FileAccess::get_modified_time(shader_inc->get_path())) {
+			if (use_autoreload) {
+				_reload_shader_include_from_disk();
+			} else {
+				disk_changed->call_deferred(SNAME("popup_centered"));
+			}
+		}
 		return;
 	}
 
-	if (shader->is_built_in()) {
+	if (shader.is_null() || shader->is_built_in()) {
 		return;
 	}
 
-	bool use_autoreload = bool(EDITOR_GET("text_editor/behavior/files/auto_reload_scripts_on_external_change"));
 	if (shader->get_last_modified_time() != FileAccess::get_modified_time(shader->get_path())) {
 		if (use_autoreload) {
 			_reload_shader_from_disk();
@@ -551,6 +631,23 @@ void ShaderEditor::_reload_shader_from_disk() {
 	shader_editor->reload_text();
 }
 
+void ShaderEditor::_reload_shader_include_from_disk() {
+	Ref<ShaderInclude> rel_shader_include = ResourceLoader::load(shader_inc->get_path(), shader_inc->get_class(), ResourceFormatLoader::CACHE_MODE_IGNORE);
+	ERR_FAIL_COND(!rel_shader_include.is_valid());
+
+	shader_inc->set_code(rel_shader_include->get_code());
+	shader_inc->set_last_modified_time(rel_shader_include->get_last_modified_time());
+	shader_editor->reload_text();
+}
+
+void ShaderEditor::_reload() {
+	if (shader.is_valid()) {
+		_reload_shader_from_disk();
+	} else if (shader_inc.is_valid()) {
+		_reload_shader_include_from_disk();
+	}
+}
+
 void ShaderEditor::edit(const Ref<Shader> &p_shader) {
 	if (p_shader.is_null() || !p_shader->is_text_shader()) {
 		return;
@@ -561,37 +658,73 @@ void ShaderEditor::edit(const Ref<Shader> &p_shader) {
 	}
 
 	shader = p_shader;
+	shader_inc = Ref<ShaderInclude>();
+
+	shader_editor->set_edited_shader(shader);
+}
+
+void ShaderEditor::edit(const Ref<ShaderInclude> &p_shader_inc) {
+	if (p_shader_inc.is_null()) {
+		return;
+	}
 
-	shader_editor->set_edited_shader(p_shader);
+	if (shader_inc == p_shader_inc) {
+		return;
+	}
 
-	//vertex_editor->set_edited_shader(shader,ShaderLanguage::SHADER_MATERIAL_VERTEX);
-	// see if already has it
+	shader_inc = p_shader_inc;
+	shader = Ref<Shader>();
+
+	shader_editor->set_edited_shader_include(p_shader_inc);
 }
 
 void ShaderEditor::save_external_data(const String &p_str) {
-	if (shader.is_null()) {
+	if (shader.is_null() && shader_inc.is_null()) {
 		disk_changed->hide();
 		return;
 	}
 
 	apply_shaders();
-	if (!shader->is_built_in()) {
-		//external shader, save it
+
+	Ref<Shader> edited_shader = shader_editor->get_edited_shader();
+	if (edited_shader.is_valid()) {
+		ResourceSaver::save(edited_shader->get_path(), edited_shader);
+	}
+	if (shader.is_valid() && shader != edited_shader) {
 		ResourceSaver::save(shader->get_path(), shader);
 	}
 
+	Ref<ShaderInclude> edited_shader_inc = shader_editor->get_edited_shader_include();
+	if (edited_shader_inc.is_valid()) {
+		ResourceSaver::save(edited_shader_inc->get_path(), edited_shader_inc);
+	}
+	if (shader_inc.is_valid() && shader_inc != edited_shader_inc) {
+		ResourceSaver::save(shader_inc->get_path(), shader_inc);
+	}
+
 	disk_changed->hide();
 }
 
+void ShaderEditor::validate_script() {
+	shader_editor->_validate_script();
+}
+
 void ShaderEditor::apply_shaders() {
+	String editor_code = shader_editor->get_text_editor()->get_text();
 	if (shader.is_valid()) {
 		String shader_code = shader->get_code();
-		String editor_code = shader_editor->get_text_editor()->get_text();
 		if (shader_code != editor_code) {
 			shader->set_code(editor_code);
 			shader->set_edited(true);
 		}
 	}
+	if (shader_inc.is_valid()) {
+		String shader_inc_code = shader_inc->get_code();
+		if (shader_inc_code != editor_code) {
+			shader_inc->set_code(editor_code);
+			shader_inc->set_edited(true);
+		}
+	}
 }
 
 void ShaderEditor::_text_edit_gui_input(const Ref<InputEvent> &ev) {
@@ -704,6 +837,7 @@ ShaderEditor::ShaderEditor() {
 	_update_warnings(false);
 
 	shader_editor = memnew(ShaderTextEditor);
+
 	shader_editor->set_v_size_flags(SIZE_EXPAND_FILL);
 	shader_editor->add_theme_constant_override("separation", 0);
 	shader_editor->set_anchors_and_offsets_preset(Control::PRESET_FULL_RECT);
@@ -829,7 +963,7 @@ ShaderEditor::ShaderEditor() {
 	dl->set_text(TTR("This shader has been modified on disk.\nWhat action should be taken?"));
 	vbc->add_child(dl);
 
-	disk_changed->connect("confirmed", callable_mp(this, &ShaderEditor::_reload_shader_from_disk));
+	disk_changed->connect("confirmed", callable_mp(this, &ShaderEditor::_reload));
 	disk_changed->set_ok_button_text(TTR("Reload"));
 
 	disk_changed->add_button(TTR("Resave"), !DisplayServer::get_singleton()->get_swap_cancel_ok(), "resave");
@@ -844,19 +978,37 @@ void ShaderEditorPlugin::_update_shader_list() {
 	shader_list->clear();
 	for (uint32_t i = 0; i < edited_shaders.size(); i++) {
 		String text;
-		String path = edited_shaders[i].shader->get_path();
-		String _class = edited_shaders[i].shader->get_class();
+		String path;
+		String _class;
+		String shader_name;
+		if (edited_shaders[i].shader.is_valid()) {
+			Ref<Shader> shader = edited_shaders[i].shader;
+
+			path = shader->get_path();
+			_class = shader->get_class();
+			shader_name = shader->get_name();
+		} else {
+			Ref<ShaderInclude> shader_inc = edited_shaders[i].shader_inc;
+
+			path = shader_inc->get_path();
+			_class = shader_inc->get_class();
+			shader_name = shader_inc->get_name();
+		}
 
 		if (path.is_resource_file()) {
 			text = path.get_file();
-		} else if (edited_shaders[i].shader->get_name() != "") {
-			text = edited_shaders[i].shader->get_name();
+		} else if (shader_name != "") {
+			text = shader_name;
 		} else {
-			text = _class + ":" + itos(edited_shaders[i].shader->get_instance_id());
+			if (edited_shaders[i].shader.is_valid()) {
+				text = _class + ":" + itos(edited_shaders[i].shader->get_instance_id());
+			} else {
+				text = _class + ":" + itos(edited_shaders[i].shader_inc->get_instance_id());
+			}
 		}
 
 		if (!shader_list->has_theme_icon(_class, SNAME("EditorIcons"))) {
-			_class = "Resource";
+			_class = "TextFile";
 		}
 		Ref<Texture2D> icon = shader_list->get_theme_icon(_class, SNAME("EditorIcons"));
 
@@ -874,35 +1026,50 @@ void ShaderEditorPlugin::_update_shader_list() {
 }
 
 void ShaderEditorPlugin::edit(Object *p_object) {
-	Shader *s = Object::cast_to<Shader>(p_object);
-	for (uint32_t i = 0; i < edited_shaders.size(); i++) {
-		if (edited_shaders[i].shader.ptr() == s) {
-			// Exists, select.
-			shader_tabs->set_current_tab(i);
-			shader_list->select(i);
-			return;
-		}
-	}
-	// Add.
 	EditedShader es;
-	es.shader = Ref<Shader>(s);
-	Ref<VisualShader> vs = es.shader;
-	if (vs.is_valid()) {
-		es.visual_shader_editor = memnew(VisualShaderEditor);
-		shader_tabs->add_child(es.visual_shader_editor);
-		es.visual_shader_editor->edit(vs.ptr());
-	} else {
+
+	ShaderInclude *si = Object::cast_to<ShaderInclude>(p_object);
+	if (si != nullptr) {
+		for (uint32_t i = 0; i < edited_shaders.size(); i++) {
+			if (edited_shaders[i].shader_inc.ptr() == si) {
+				shader_tabs->set_current_tab(i);
+				shader_list->select(i);
+				return;
+			}
+		}
+		es.shader_inc = Ref<ShaderInclude>(si);
 		es.shader_editor = memnew(ShaderEditor);
+		es.shader_editor->edit(si);
 		shader_tabs->add_child(es.shader_editor);
-		es.shader_editor->edit(s);
+	} else {
+		Shader *s = Object::cast_to<Shader>(p_object);
+		for (uint32_t i = 0; i < edited_shaders.size(); i++) {
+			if (edited_shaders[i].shader.ptr() == s) {
+				shader_tabs->set_current_tab(i);
+				shader_list->select(i);
+				return;
+			}
+		}
+		es.shader = Ref<Shader>(s);
+		Ref<VisualShader> vs = es.shader;
+		if (vs.is_valid()) {
+			es.visual_shader_editor = memnew(VisualShaderEditor);
+			es.visual_shader_editor->edit(vs.ptr());
+			shader_tabs->add_child(es.visual_shader_editor);
+		} else {
+			es.shader_editor = memnew(ShaderEditor);
+			es.shader_editor->edit(s);
+			shader_tabs->add_child(es.shader_editor);
+		}
 	}
+
 	shader_tabs->set_current_tab(shader_tabs->get_tab_count() - 1);
 	edited_shaders.push_back(es);
 	_update_shader_list();
 }
 
 bool ShaderEditorPlugin::handles(Object *p_object) const {
-	return Object::cast_to<Shader>(p_object) != nullptr;
+	return Object::cast_to<Shader>(p_object) != nullptr || Object::cast_to<ShaderInclude>(p_object) != nullptr;
 }
 
 void ShaderEditorPlugin::make_visible(bool p_visible) {
@@ -949,6 +1116,9 @@ void ShaderEditorPlugin::apply_changes() {
 }
 
 void ShaderEditorPlugin::_shader_selected(int p_index) {
+	if (edited_shaders[p_index].shader_editor) {
+		edited_shaders[p_index].shader_editor->validate_script();
+	}
 	shader_tabs->set_current_tab(p_index);
 }
 
@@ -975,31 +1145,56 @@ void ShaderEditorPlugin::_resource_saved(Object *obj) {
 void ShaderEditorPlugin::_menu_item_pressed(int p_index) {
 	switch (p_index) {
 		case FILE_NEW: {
-			String base_path = FileSystemDock::get_singleton()->get_current_path();
+			String base_path = FileSystemDock::get_singleton()->get_current_path().get_base_dir();
 			shader_create_dialog->config(base_path.plus_file("new_shader"), false, false, 0);
 			shader_create_dialog->popup_centered();
 		} break;
+		case FILE_NEW_INCLUDE: {
+			String base_path = FileSystemDock::get_singleton()->get_current_path().get_base_dir();
+			shader_create_dialog->config(base_path.plus_file("new_shader"), false, false, 2);
+			shader_create_dialog->popup_centered();
+		} break;
 		case FILE_OPEN: {
 			InspectorDock::get_singleton()->open_resource("Shader");
 		} break;
+		case FILE_OPEN_INCLUDE: {
+			InspectorDock::get_singleton()->open_resource("ShaderInclude");
+		} break;
 		case FILE_SAVE: {
 			int index = shader_tabs->get_current_tab();
 			ERR_FAIL_INDEX(index, shader_tabs->get_tab_count());
-			EditorNode::get_singleton()->save_resource(edited_shaders[index].shader);
+			if (edited_shaders[index].shader.is_valid()) {
+				EditorNode::get_singleton()->save_resource(edited_shaders[index].shader);
+			} else {
+				EditorNode::get_singleton()->save_resource(edited_shaders[index].shader_inc);
+			}
 		} break;
 		case FILE_SAVE_AS: {
 			int index = shader_tabs->get_current_tab();
 			ERR_FAIL_INDEX(index, shader_tabs->get_tab_count());
-			String path = edited_shaders[index].shader->get_path();
-			if (!path.is_resource_file()) {
-				path = "";
+			String path;
+			if (edited_shaders[index].shader.is_valid()) {
+				path = edited_shaders[index].shader->get_path();
+				if (!path.is_resource_file()) {
+					path = "";
+				}
+				EditorNode::get_singleton()->save_resource_as(edited_shaders[index].shader, path);
+			} else {
+				path = edited_shaders[index].shader_inc->get_path();
+				if (!path.is_resource_file()) {
+					path = "";
+				}
+				EditorNode::get_singleton()->save_resource_as(edited_shaders[index].shader_inc, path);
 			}
-			EditorNode::get_singleton()->save_resource_as(edited_shaders[index].shader, path);
 		} break;
 		case FILE_INSPECT: {
 			int index = shader_tabs->get_current_tab();
 			ERR_FAIL_INDEX(index, shader_tabs->get_tab_count());
-			EditorNode::get_singleton()->push_item(edited_shaders[index].shader.ptr());
+			if (edited_shaders[index].shader.is_valid()) {
+				EditorNode::get_singleton()->push_item(edited_shaders[index].shader.ptr());
+			} else {
+				EditorNode::get_singleton()->push_item(edited_shaders[index].shader_inc.ptr());
+			}
 		} break;
 		case FILE_CLOSE: {
 			_close_shader(shader_tabs->get_current_tab());
@@ -1011,6 +1206,10 @@ void ShaderEditorPlugin::_shader_created(Ref<Shader> p_shader) {
 	EditorNode::get_singleton()->push_item(p_shader.ptr());
 }
 
+void ShaderEditorPlugin::_shader_include_created(Ref<ShaderInclude> p_shader_inc) {
+	EditorNode::get_singleton()->push_item(p_shader_inc.ptr());
+}
+
 ShaderEditorPlugin::ShaderEditorPlugin() {
 	main_split = memnew(HSplitContainer);
 
@@ -1021,14 +1220,16 @@ ShaderEditorPlugin::ShaderEditorPlugin() {
 	file_menu = memnew(MenuButton);
 	file_menu->set_text(TTR("File"));
 	file_menu->get_popup()->add_item(TTR("New Shader"), FILE_NEW);
+	file_menu->get_popup()->add_item(TTR("New Shader Include"), FILE_NEW_INCLUDE);
 	file_menu->get_popup()->add_separator();
-	file_menu->get_popup()->add_item(TTR("Load Shader"), FILE_OPEN);
-	file_menu->get_popup()->add_item(TTR("Save Shader"), FILE_SAVE);
-	file_menu->get_popup()->add_item(TTR("Save Shader As"), FILE_SAVE_AS);
+	file_menu->get_popup()->add_item(TTR("Load Shader File"), FILE_OPEN);
+	file_menu->get_popup()->add_item(TTR("Load Shader Include File"), FILE_OPEN_INCLUDE);
+	file_menu->get_popup()->add_item(TTR("Save File"), FILE_SAVE);
+	file_menu->get_popup()->add_item(TTR("Save File As"), FILE_SAVE_AS);
 	file_menu->get_popup()->add_separator();
-	file_menu->get_popup()->add_item(TTR("Open Shader in Inspector"), FILE_INSPECT);
+	file_menu->get_popup()->add_item(TTR("Open File in Inspector"), FILE_INSPECT);
 	file_menu->get_popup()->add_separator();
-	file_menu->get_popup()->add_item(TTR("Close Shader"), FILE_CLOSE);
+	file_menu->get_popup()->add_item(TTR("Close File"), FILE_CLOSE);
 	file_menu->get_popup()->connect("id_pressed", callable_mp(this, &ShaderEditorPlugin::_menu_item_pressed));
 	file_hb->add_child(file_menu);
 
@@ -1060,6 +1261,7 @@ ShaderEditorPlugin::ShaderEditorPlugin() {
 	shader_create_dialog = memnew(ShaderCreateDialog);
 	vb->add_child(shader_create_dialog);
 	shader_create_dialog->connect("shader_created", callable_mp(this, &ShaderEditorPlugin::_shader_created));
+	shader_create_dialog->connect("shader_include_created", callable_mp(this, &ShaderEditorPlugin::_shader_include_created));
 }
 
 ShaderEditorPlugin::~ShaderEditorPlugin() {
diff --git a/editor/plugins/shader_editor_plugin.h b/editor/plugins/shader_editor_plugin.h
index 2e0dbe0d60..c9cd75e451 100644
--- a/editor/plugins/shader_editor_plugin.h
+++ b/editor/plugins/shader_editor_plugin.h
@@ -40,6 +40,7 @@
 #include "scene/gui/text_edit.h"
 #include "scene/main/timer.h"
 #include "scene/resources/shader.h"
+#include "scene/resources/shader_include.h"
 #include "servers/rendering/shader_warnings.h"
 
 class ItemList;
@@ -59,6 +60,7 @@ class ShaderTextEditor : public CodeTextEditor {
 	Ref<CodeHighlighter> syntax_highlighter;
 	RichTextLabel *warnings_panel = nullptr;
 	Ref<Shader> shader;
+	Ref<ShaderInclude> shader_inc;
 	List<ShaderWarning> warnings;
 	Error last_compile_result = Error::OK;
 
@@ -79,7 +81,14 @@ public:
 	void set_warnings_panel(RichTextLabel *p_warnings_panel);
 
 	Ref<Shader> get_edited_shader() const;
+	Ref<ShaderInclude> get_edited_shader_include() const;
+
 	void set_edited_shader(const Ref<Shader> &p_shader);
+	void set_edited_shader(const Ref<Shader> &p_shader, const String &p_code);
+	void set_edited_shader_include(const Ref<ShaderInclude> &p_include);
+	void set_edited_shader_include(const Ref<ShaderInclude> &p_include, const String &p_code);
+	void set_edited_code(const String &p_code);
+
 	ShaderTextEditor();
 };
 
@@ -129,12 +138,15 @@ class ShaderEditor : public PanelContainer {
 
 	void _menu_option(int p_option);
 	mutable Ref<Shader> shader;
+	mutable Ref<ShaderInclude> shader_inc;
 
 	void _editor_settings_changed();
 	void _project_settings_changed();
 
 	void _check_for_external_edit();
 	void _reload_shader_from_disk();
+	void _reload_shader_include_from_disk();
+	void _reload();
 	void _show_warnings_panel(bool p_show);
 	void _warning_clicked(Variant p_line);
 	void _update_warnings(bool p_validate);
@@ -143,21 +155,21 @@ protected:
 	void _notification(int p_what);
 	static void _bind_methods();
 	void _make_context_menu(bool p_selection, Vector2 p_position);
-	void _text_edit_gui_input(const Ref<InputEvent> &ev);
+	void _text_edit_gui_input(const Ref<InputEvent> &p_ev);
 
 	void _update_bookmark_list();
 	void _bookmark_item_pressed(int p_idx);
 
 public:
 	void apply_shaders();
-
 	void ensure_select_current();
 	void edit(const Ref<Shader> &p_shader);
-
+	void edit(const Ref<ShaderInclude> &p_shader_inc);
 	void goto_line_selection(int p_line, int p_begin, int p_end);
+	void save_external_data(const String &p_str = "");
+	void validate_script();
 
 	virtual Size2 get_minimum_size() const override { return Size2(0, 200); }
-	void save_external_data(const String &p_str = "");
 
 	ShaderEditor();
 };
@@ -167,6 +179,7 @@ class ShaderEditorPlugin : public EditorPlugin {
 
 	struct EditedShader {
 		Ref<Shader> shader;
+		Ref<ShaderInclude> shader_inc;
 		ShaderEditor *shader_editor = nullptr;
 		VisualShaderEditor *visual_shader_editor = nullptr;
 	};
@@ -175,7 +188,9 @@ class ShaderEditorPlugin : public EditorPlugin {
 
 	enum {
 		FILE_NEW,
+		FILE_NEW_INCLUDE,
 		FILE_OPEN,
+		FILE_OPEN_INCLUDE,
 		FILE_SAVE,
 		FILE_SAVE_AS,
 		FILE_INSPECT,
@@ -199,6 +214,7 @@ class ShaderEditorPlugin : public EditorPlugin {
 	void _close_shader(int p_index);
 
 	void _shader_created(Ref<Shader> p_shader);
+	void _shader_include_created(Ref<ShaderInclude> p_shader_inc);
 
 public:
 	virtual String get_name() const override { return "Shader"; }
diff --git a/editor/shader_create_dialog.cpp b/editor/shader_create_dialog.cpp
index 28e1e9bf22..7ae03ee96f 100644
--- a/editor/shader_create_dialog.cpp
+++ b/editor/shader_create_dialog.cpp
@@ -33,6 +33,7 @@
 #include "core/config/project_settings.h"
 #include "editor/editor_file_dialog.h"
 #include "editor/editor_scale.h"
+#include "scene/resources/shader_include.h"
 #include "scene/resources/visual_shader.h"
 #include "servers/rendering/shader_types.h"
 
@@ -43,15 +44,15 @@ void ShaderCreateDialog::_notification(int p_what) {
 
 			String last_lang = EditorSettings::get_singleton()->get_project_metadata("shader_setup", "last_selected_language", "");
 			if (!last_lang.is_empty()) {
-				for (int i = 0; i < language_menu->get_item_count(); i++) {
-					if (language_menu->get_item_text(i) == last_lang) {
-						language_menu->select(i);
-						current_language = i;
+				for (int i = 0; i < type_menu->get_item_count(); i++) {
+					if (type_menu->get_item_text(i) == last_lang) {
+						type_menu->select(i);
+						current_type = i;
 						break;
 					}
 				}
 			} else {
-				language_menu->select(default_language);
+				type_menu->select(default_type);
 			}
 
 			current_mode = EditorSettings::get_singleton()->get_project_metadata("shader_setup", "last_selected_mode", 0);
@@ -67,12 +68,17 @@ void ShaderCreateDialog::_notification(int p_what) {
 void ShaderCreateDialog::_update_theme() {
 	Ref<Texture2D> shader_icon = gc->get_theme_icon(SNAME("Shader"), SNAME("EditorIcons"));
 	if (shader_icon.is_valid()) {
-		language_menu->set_item_icon(0, shader_icon);
+		type_menu->set_item_icon(0, shader_icon);
 	}
 
 	Ref<Texture2D> visual_shader_icon = gc->get_theme_icon(SNAME("VisualShader"), SNAME("EditorIcons"));
 	if (visual_shader_icon.is_valid()) {
-		language_menu->set_item_icon(1, visual_shader_icon);
+		type_menu->set_item_icon(1, visual_shader_icon);
+	}
+
+	Ref<Texture2D> include_icon = gc->get_theme_icon(SNAME("TextFile"), SNAME("EditorIcons"));
+	if (include_icon.is_valid()) {
+		type_menu->set_item_icon(2, include_icon);
 	}
 
 	path_button->set_icon(get_theme_icon(SNAME("Folder"), SNAME("EditorIcons")));
@@ -80,7 +86,7 @@ void ShaderCreateDialog::_update_theme() {
 }
 
 void ShaderCreateDialog::_update_language_info() {
-	language_data.clear();
+	type_data.clear();
 
 	for (int i = 0; i < SHADER_TYPE_MAX; i++) {
 		ShaderTypeData data;
@@ -88,12 +94,15 @@ void ShaderCreateDialog::_update_language_info() {
 			data.use_templates = true;
 			data.extensions.push_back("gdshader");
 			data.default_extension = "gdshader";
+		} else if (i == int(SHADER_TYPE_INC)) {
+			data.extensions.push_back("gdshaderinc");
+			data.default_extension = "gdshaderinc";
 		} else {
 			data.default_extension = "tres";
 		}
 		data.extensions.push_back("res");
 		data.extensions.push_back("tres");
-		language_data.push_back(data);
+		type_data.push_back(data);
 	}
 }
 
@@ -136,69 +145,97 @@ void ShaderCreateDialog::ok_pressed() {
 
 void ShaderCreateDialog::_create_new() {
 	Ref<Resource> shader;
-
-	if (language_menu->get_selected() == int(SHADER_TYPE_TEXT)) {
-		Ref<Shader> text_shader;
-		text_shader.instantiate();
-		shader = text_shader;
-
-		StringBuilder code;
-		code += vformat("shader_type %s;\n", mode_menu->get_text().replace(" ", "").camelcase_to_underscore());
-
-		if (current_template == 0) { // Default template.
-			code += "\n";
-			switch (current_mode) {
-				case Shader::MODE_SPATIAL:
-					code += "void fragment() {\n";
-					code += "\t// Place fragment code here.\n";
-					code += "}\n";
-					break;
-				case Shader::MODE_CANVAS_ITEM:
-					code += "void fragment() {\n";
-					code += "\t// Place fragment code here.\n";
-					code += "}\n";
-					break;
-				case Shader::MODE_PARTICLES:
-					code += "void start() {\n";
-					code += "\t// Place start code here.\n";
-					code += "}\n";
-					code += "\n";
-					code += "void process() {\n";
-					code += "\t// Place process code here.\n";
-					code += "}\n";
-					break;
-				case Shader::MODE_SKY:
-					code += "void sky() {\n";
-					code += "\t// Place sky code here.\n";
-					code += "}\n";
-					break;
-				case Shader::MODE_FOG:
-					code += "void fog() {\n";
-					code += "\t// Place fog code here.\n";
-					code += "}\n";
-					break;
+	Ref<Resource> shader_inc;
+
+	switch (type_menu->get_selected()) {
+		case SHADER_TYPE_TEXT: {
+			Ref<Shader> text_shader;
+			text_shader.instantiate();
+			shader = text_shader;
+
+			StringBuilder code;
+			code += vformat("shader_type %s;\n", mode_menu->get_text().replace(" ", "").camelcase_to_underscore());
+
+			if (current_template == 0) { // Default template.
+				code += "\n";
+				switch (current_mode) {
+					case Shader::MODE_SPATIAL:
+						code += "void fragment() {\n";
+						code += "\t// Place fragment code here.\n";
+						code += "}\n";
+						break;
+					case Shader::MODE_CANVAS_ITEM:
+						code += "void fragment() {\n";
+						code += "\t// Place fragment code here.\n";
+						code += "}\n";
+						break;
+					case Shader::MODE_PARTICLES:
+						code += "void start() {\n";
+						code += "\t// Place start code here.\n";
+						code += "}\n";
+						code += "\n";
+						code += "void process() {\n";
+						code += "\t// Place process code here.\n";
+						code += "}\n";
+						break;
+					case Shader::MODE_SKY:
+						code += "void sky() {\n";
+						code += "\t// Place sky code here.\n";
+						code += "}\n";
+						break;
+					case Shader::MODE_FOG:
+						code += "void fog() {\n";
+						code += "\t// Place fog code here.\n";
+						code += "}\n";
+						break;
+				}
 			}
-		}
-		text_shader->set_code(code.as_string());
-	} else {
-		Ref<VisualShader> visual_shader;
-		visual_shader.instantiate();
-		shader = visual_shader;
-		visual_shader->set_mode(Shader::Mode(current_mode));
+			text_shader->set_code(code.as_string());
+		} break;
+		case SHADER_TYPE_VISUAL: {
+			Ref<VisualShader> visual_shader;
+			visual_shader.instantiate();
+			shader = visual_shader;
+			visual_shader->set_mode(Shader::Mode(current_mode));
+		} break;
+		case SHADER_TYPE_INC: {
+			Ref<ShaderInclude> include;
+			include.instantiate();
+			shader_inc = include;
+		} break;
+		default: {
+		} break;
 	}
 
-	if (!is_built_in) {
+	if (shader.is_null()) {
 		String lpath = ProjectSettings::get_singleton()->localize_path(file_path->get_text());
-		shader->set_path(lpath);
-		Error err = ResourceSaver::save(lpath, shader, ResourceSaver::FLAG_CHANGE_PATH);
-		if (err != OK) {
-			alert->set_text(TTR("Error - Could not create shader in filesystem."));
+		shader_inc->set_path(lpath);
+
+		Error error = ResourceSaver::save(lpath, shader_inc, ResourceSaver::FLAG_CHANGE_PATH);
+		if (error != OK) {
+			alert->set_text(TTR("Error - Could not create shader include in filesystem."));
 			alert->popup_centered();
 			return;
 		}
+
+		emit_signal(SNAME("shader_include_created"), shader_inc);
+	} else {
+		if (!is_built_in) {
+			String lpath = ProjectSettings::get_singleton()->localize_path(file_path->get_text());
+			shader->set_path(lpath);
+
+			Error error = ResourceSaver::save(lpath, shader, ResourceSaver::FLAG_CHANGE_PATH);
+			if (error != OK) {
+				alert->set_text(TTR("Error - Could not create shader in filesystem."));
+				alert->popup_centered();
+				return;
+			}
+		}
+
+		emit_signal(SNAME("shader_created"), shader);
 	}
 
-	emit_signal(SNAME("shader_created"), shader);
+	file_path->set_text(file_path->get_text().get_base_dir());
 	hide();
 }
 
@@ -215,9 +252,9 @@ void ShaderCreateDialog::_load_exist() {
 	hide();
 }
 
-void ShaderCreateDialog::_language_changed(int p_language) {
-	current_language = p_language;
-	ShaderTypeData data = language_data[p_language];
+void ShaderCreateDialog::_type_changed(int p_language) {
+	current_type = p_language;
+	ShaderTypeData data = type_data[p_language];
 
 	String selected_ext = "." + data.default_extension;
 	String path = file_path->get_text();
@@ -238,6 +275,8 @@ void ShaderCreateDialog::_language_changed(int p_language) {
 	_path_changed(path);
 	file_path->set_text(path);
 
+	type_menu->set_item_disabled(int(SHADER_TYPE_INC), load_enabled);
+	mode_menu->set_disabled(p_language == SHADER_TYPE_INC);
 	template_menu->set_disabled(!data.use_templates);
 	template_menu->clear();
 
@@ -253,7 +292,7 @@ void ShaderCreateDialog::_language_changed(int p_language) {
 		template_menu->add_item(TTR("N/A"));
 	}
 
-	EditorSettings::get_singleton()->set_project_metadata("shader_setup", "last_selected_language", language_menu->get_item_text(language_menu->get_selected()));
+	EditorSettings::get_singleton()->set_project_metadata("shader_setup", "last_selected_language", type_menu->get_item_text(type_menu->get_selected()));
 	_update_dialog();
 }
 
@@ -275,7 +314,7 @@ void ShaderCreateDialog::_browse_path() {
 	file_browse->set_disable_overwrite_warning(true);
 	file_browse->clear_filters();
 
-	List<String> extensions = language_data[language_menu->get_selected()].extensions;
+	List<String> extensions = type_data[type_menu->get_selected()].extensions;
 
 	for (const String &E : extensions) {
 		file_browse->add_filter("*." + E);
@@ -330,8 +369,8 @@ void ShaderCreateDialog::_path_submitted(const String &p_path) {
 void ShaderCreateDialog::config(const String &p_base_path, bool p_built_in_enabled, bool p_load_enabled, int p_preferred_type, int p_preferred_mode) {
 	if (!p_base_path.is_empty()) {
 		initial_base_path = p_base_path.get_basename();
-		file_path->set_text(initial_base_path + "." + language_data[language_menu->get_selected()].default_extension);
-		current_language = language_menu->get_selected();
+		file_path->set_text(initial_base_path + "." + type_data[type_menu->get_selected()].default_extension);
+		current_type = type_menu->get_selected();
 	} else {
 		initial_base_path = "";
 		file_path->set_text("");
@@ -342,8 +381,8 @@ void ShaderCreateDialog::config(const String &p_base_path, bool p_built_in_enabl
 	load_enabled = p_load_enabled;
 
 	if (p_preferred_type > -1) {
-		language_menu->select(p_preferred_type);
-		_language_changed(p_preferred_type);
+		type_menu->select(p_preferred_type);
+		_type_changed(p_preferred_type);
 	}
 
 	if (p_preferred_mode > -1) {
@@ -351,7 +390,7 @@ void ShaderCreateDialog::config(const String &p_base_path, bool p_built_in_enabl
 		_mode_changed(p_preferred_mode);
 	}
 
-	_language_changed(current_language);
+	_type_changed(current_type);
 	_path_changed(file_path->get_text());
 }
 
@@ -384,14 +423,14 @@ String ShaderCreateDialog::_validate_path(const String &p_path) {
 	HashSet<String> extensions;
 
 	for (int i = 0; i < SHADER_TYPE_MAX; i++) {
-		for (const String &ext : language_data[i].extensions) {
+		for (const String &ext : type_data[i].extensions) {
 			if (!extensions.has(ext)) {
 				extensions.insert(ext);
 			}
 		}
 	}
 
-	ShaderTypeData data = language_data[language_menu->get_selected()];
+	ShaderTypeData data = type_data[type_menu->get_selected()];
 
 	bool found = false;
 	bool match = false;
@@ -399,8 +438,8 @@ String ShaderCreateDialog::_validate_path(const String &p_path) {
 	for (const String &ext : extensions) {
 		if (ext.nocasecmp_to(extension) == 0) {
 			found = true;
-			for (const String &lang_ext : language_data[current_language].extensions) {
-				if (lang_ext.nocasecmp_to(extension) == 0) {
+			for (const String &type_ext : type_data[current_type].extensions) {
+				if (type_ext.nocasecmp_to(extension) == 0) {
 					match = true;
 					break;
 				}
@@ -504,6 +543,7 @@ void ShaderCreateDialog::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("config", "path", "built_in_enabled", "load_enabled"), &ShaderCreateDialog::config, DEFVAL(true), DEFVAL(true));
 
 	ADD_SIGNAL(MethodInfo("shader_created", PropertyInfo(Variant::OBJECT, "shader", PROPERTY_HINT_RESOURCE_TYPE, "Shader")));
+	ADD_SIGNAL(MethodInfo("shader_include_created", PropertyInfo(Variant::OBJECT, "shader_include", PROPERTY_HINT_RESOURCE_TYPE, "ShaderInclude")));
 }
 
 ShaderCreateDialog::ShaderCreateDialog() {
@@ -547,24 +587,27 @@ ShaderCreateDialog::ShaderCreateDialog() {
 	vb->add_child(status_panel);
 	add_child(vb);
 
-	// Language.
+	// Type.
 
-	language_menu = memnew(OptionButton);
-	language_menu->set_custom_minimum_size(Size2(250, 0) * EDSCALE);
-	language_menu->set_h_size_flags(Control::SIZE_EXPAND_FILL);
-	gc->add_child(memnew(Label(TTR("Language:"))));
-	gc->add_child(language_menu);
+	type_menu = memnew(OptionButton);
+	type_menu->set_custom_minimum_size(Size2(250, 0) * EDSCALE);
+	type_menu->set_h_size_flags(Control::SIZE_EXPAND_FILL);
+	gc->add_child(memnew(Label(TTR("Type:"))));
+	gc->add_child(type_menu);
 
 	for (int i = 0; i < SHADER_TYPE_MAX; i++) {
-		String language;
+		String type;
 		bool invalid = false;
 		switch (i) {
 			case SHADER_TYPE_TEXT:
-				language = "Shader";
-				default_language = i;
+				type = "Shader";
+				default_type = i;
 				break;
 			case SHADER_TYPE_VISUAL:
-				language = "VisualShader";
+				type = "VisualShader";
+				break;
+			case SHADER_TYPE_INC:
+				type = "ShaderInclude";
 				break;
 			case SHADER_TYPE_MAX:
 				invalid = true;
@@ -576,13 +619,13 @@ ShaderCreateDialog::ShaderCreateDialog() {
 		if (invalid) {
 			continue;
 		}
-		language_menu->add_item(language);
+		type_menu->add_item(type);
 	}
-	if (default_language >= 0) {
-		language_menu->select(default_language);
+	if (default_type >= 0) {
+		type_menu->select(default_type);
 	}
-	current_language = default_language;
-	language_menu->connect("item_selected", callable_mp(this, &ShaderCreateDialog::_language_changed));
+	current_type = default_type;
+	type_menu->connect("item_selected", callable_mp(this, &ShaderCreateDialog::_type_changed));
 
 	// Modes.
 
diff --git a/editor/shader_create_dialog.h b/editor/shader_create_dialog.h
index 6737ce4f10..44bd866fbd 100644
--- a/editor/shader_create_dialog.h
+++ b/editor/shader_create_dialog.h
@@ -47,6 +47,7 @@ class ShaderCreateDialog : public ConfirmationDialog {
 	enum ShaderType {
 		SHADER_TYPE_TEXT,
 		SHADER_TYPE_VISUAL,
+		SHADER_TYPE_INC,
 		SHADER_TYPE_MAX,
 	};
 
@@ -56,14 +57,14 @@ class ShaderCreateDialog : public ConfirmationDialog {
 		bool use_templates = false;
 	};
 
-	List<ShaderTypeData> language_data;
+	List<ShaderTypeData> type_data;
 
 	GridContainer *gc = nullptr;
 	Label *error_label = nullptr;
 	Label *path_error_label = nullptr;
 	Label *builtin_warning_label = nullptr;
 	PanelContainer *status_panel = nullptr;
-	OptionButton *language_menu = nullptr;
+	OptionButton *type_menu = nullptr;
 	OptionButton *mode_menu = nullptr;
 	OptionButton *template_menu = nullptr;
 	CheckBox *internal = nullptr;
@@ -79,8 +80,8 @@ class ShaderCreateDialog : public ConfirmationDialog {
 	bool built_in_enabled = true;
 	bool load_enabled = false;
 	bool re_check_path = false;
-	int current_language = -1;
-	int default_language = -1;
+	int current_type = -1;
+	int default_type = -1;
 	int current_mode = 0;
 	int current_template = 0;
 
@@ -89,7 +90,7 @@ class ShaderCreateDialog : public ConfirmationDialog {
 	void _path_hbox_sorted();
 	void _path_changed(const String &p_path = String());
 	void _path_submitted(const String &p_path = String());
-	void _language_changed(int p_language = 0);
+	void _type_changed(int p_type = 0);
 	void _built_in_toggled(bool p_enabled);
 	void _template_changed(int p_template = 0);
 	void _mode_changed(int p_mode = 0);